31     return std::forward<int&>(x)        == 42  in test_constexpr_forward()
32         && std::forward<int>(x)         == 42  in test_constexpr_forward()
33         && std::forward<const int&>(x)  == 42  in test_constexpr_forward()
34         && std::forward<const int>(x)   == 42  in test_constexpr_forward()
35         && std::forward<int&&>(x)       == 42  in test_constexpr_forward()
36         && std::forward<const int&&>(x) == 42  in test_constexpr_forward()
37         && std::forward<const int&>(cx) == 101  in test_constexpr_forward()
38         && std::forward<const int>(cx)  == 101;  in test_constexpr_forward()
50     static_assert(std::is_same<decltype(std::forward<A&>(a)), A&>::value, "");  in main()
51     static_assert(std::is_same<decltype(std::forward<A>(a)), A&&>::value, "");  in main()
52     static_assert(std::is_same<decltype(std::forward<A>(source())), A&&>::value, "");  in main()
53     ASSERT_NOEXCEPT(std::forward<A&>(a));  in main()
54     ASSERT_NOEXCEPT(std::forward<A>(a));  in main()
55     ASSERT_NOEXCEPT(std::forward<A>(source()));  in main()
57     static_assert(std::is_same<decltype(std::forward<const A&>(a)), const A&>::value, "");  in main()
58     static_assert(std::is_same<decltype(std::forward<const A>(a)), const A&&>::value, "");  in main()
59     static_assert(std::is_same<decltype(std::forward<const A>(source())), const A&&>::value, "");  in main()
60     ASSERT_NOEXCEPT(std::forward<const A&>(a));  in main()
61     ASSERT_NOEXCEPT(std::forward<const A>(a));  in main()
62     ASSERT_NOEXCEPT(std::forward<const A>(source()));  in main()
64     static_assert(std::is_same<decltype(std::forward<const A&>(ca)), const A&>::value, "");  in main()
65     static_assert(std::is_same<decltype(std::forward<const A>(ca)), const A&&>::value, "");  in main()
66     static_assert(std::is_same<decltype(std::forward<const A>(csource())), const A&&>::value, "");  in main()
67     ASSERT_NOEXCEPT(std::forward<const A&>(ca));  in main()
68     ASSERT_NOEXCEPT(std::forward<const A>(ca));  in main()
69     ASSERT_NOEXCEPT(std::forward<const A>(csource()));  in main()
73     constexpr int i2 = std::forward<int>(42);  in main()
74     static_assert(std::forward<int>(42) == 42, "");  in main()
75     static_assert(std::forward<const int&>(i2) == 42, "");  in main()
83     constexpr int i2 = std::forward<int>(42);  in main()
84     static_assert(std::forward<int>(42) == 42, "" );  in main()
85     static_assert(std::forward<const int&>(i2) == 42, "");  in main()